The Club for Growth has sponsored a major television and radio ad buy to boost Rep. Justin Amash, R-Mich., who faces a primary challenge in the 3rd District.

In the television ad, released on Wednesday, the club hits Amash's primary rival, former East Grand Rapids School Trustee Brian Ellis, for various votes he took in that role. The conservative group also seeks to tie Ellis to former Gov. Jennifer Granholm, a Democrat, in the spot.

The dual buy is a six-figure radio, broadcast and cable television ad buy, according to club spokesman Barney Keller.